Collapsible core for concrete culverts.



A. E. CAMBUN.

COLLAPSIBLE CORE FOR CONCRETE CULVERTS.

APPLICATION FILED AUG- 16, 1912. 1,142,669.

WITNESSES THE NORRIS PETERS CO.. PHOTO-LITHO. WASHINGTON, D I" A. E. CAMBLIN.

COLLAPSIBLE CORE FOR CONCRETE CULVERTS.

APPLICATION FILED AUG. 16" I912.

Patented J une 8, 1915.

WITNESSES ,df W

man/ms THE NORRIS PETERS CO, PHOTO-LITHQ, WASHINGTON, D. C.

45 Fig. 1 illustrating the arches folded for a s a ARTHUR E. CAMBLIN, or STELLA, NEBRASKA.

COLLAPSIBLE CORE FOR CONCRETE oULvErtit's.

adapted to freely support mold-boards, my

object being to provide a structure which may be readily and quickly collapsed and withdrawn'from the molded structure.

A further object of my invention is to pro-' vide a constructionwhich will be compara tively simple and extremely inexpensive,

and in which therunner and the several arches may be conveniently folded so as to occupy a minimum storagespace after their removal and while in disuse. r A further object of my invention is to provide a construction embodying supporting arches and a runner, of which the former are capable of enlargement in a transverse direction, and adjustable with respect to the latter. in a vertical direction, whereby culverts of selected proportion, with respect to width and height may be formed.

-With the foregoing in mind, my invention resides in the features of construction, arrangement and operation to be hereinafter described with respect to the accompanying drawings, forming a part of this specification, and in which,

Figure 1 is a vertical, transverse section through a culvert illustrating the manner;

in which the same is supported while drying and hardening by my improved core structure shown in connection therewith; Fig. 2

is a vertical longitudinal section taken therethrough substantially on the line 22 of Fig. 1; Fig. 3 is a similar view taken therethrough substantially on the line 38 of withdrawal; F ig. 4 is a view similar to Fig. 1, illustrating the adjustability of the arches whereby to form a culvert of greater width;

Fig. 5 is a detail perspective view of one of the arches removed; and F 1g. 6 1s a similar view of a portion of the runner.

Referring now to these figures, I provide a core structure which, as usual, consists of a series of vertical transverse structures, commonly known as arches, and the edges of Specification of Letters Patent. 7

Patented Ja 8, 1915.

Application filed August 16, 1912. Serial No. 715,322.

. which areadapted to support the longitudinal extending mold-boards A, which in practice, are freely disposed thereon, and are in turn adapted to support the tamped concrete mixture B which, after-drying and hardening and the removal of the entirecore structure including the arches and mold-boards,

forms the culvert. 1

My invention resides in part in the spe.- cific constructionof the arches, one of which is shown indetail'in Fig. 5 as comprising I an uppersection C and a lower section C,

thesesections being hingedly. connected at 0, along thelr contiguous edges, and the upper section being usually .of semi-circular form in order to provide a culvert of rounded,

shape. .The lower arch section C is provided with a lower beveled longitudinal edge a at the ends of which are secured protecting platescfland said section is further provided with a vertical transverse slot oropening 0 extending partially therethrough from its lower edge and at a substantially central point, along the sides of which slot or opening are arranged cleats 0 provided Wltl'l'itllIlBCl transverse apertures c at their lower end. Arranged upon'one face of the upper section C is a supplemental section C said supplemental section being of substantially the'same size and shape as'the main upper section C, and being provided with an elongated slotted opening 0 formed there through and extending therein parallel with its lower straightedge. As clearly indicated in the several figures, the,slot c receives a bolt ciiextending from the main uppersec tioneC of the arch, whereby the said sections C andC may be secured together in selected adjustment, that is, they maybe secured inregistry as illustrated in. Fig. 1,.or they maybe adjusted and secured.

in the position, shown in Fig. 4, wherein the i supplemental section C extends'to one side of the main section C for thepurpose of supporting the substantially widened molding'structure, in the latter connection, the outer end of. the supplemental section C being supported bya vertical beam 07, and

the inner end thereof being supported by the upper ends of the cleats 0 H My invention also consists in part-in the structure of the supporting runner, a portion of which is shown in, detail in Fig. 6,.

and which is made up of a plurality .of sections DD, these sections being similar in construction and being pivotally connected. 3

at their contiguous ends by connecting members (Z in such a manner that they may, in use, be extended in longitudinal alinement and may be disconnected from one another after use, by simply removing the pivot bolt forming their connection, whereby they arev tical series of openings at, these openings being adapted for the reception of a 0011- pling pin E, by which each of the separate arches is connected thereto, said coupling pin E being adapted for passagethrough the cleat openings 0 and through a selected opening of the runner series d, whereby the parts may be secured in selected vertical adjustment. The connection thus described is adapted to be made afterthe arches have been disposed on the runner by means of the slots 0 of their lower sections C.

With the parts secured as thus described, and as particularly shown in Figs. 1 and 2, supporting blocks VF which are flexibly attached to the lower arch sections C, are disposed beneath the lower edge of the lower arch section G, whereby to form side supports. The arches are secured in selected vertical adjustment with respect to the runner which extends along the surface of the ground, and the position of the supplemental arch section C is regulated so as to provide a culvert of selected width. After this, the mold boards A are placed in position as shown, and the material placed and properly tamped in position. After the molding material has become dry and thoroughly hardened, it is necessary to remove the arches and runner, and to this end it will be noticed that longitudinal movement of the run ner embodying its several sections, is such as to move the lower arch sections C to angular positions with respect to the upper sections C, thus breaking their hinged joint at c and causing the upper sections 0 to be lowered in substantially the position shown in Fig. 3. This movement results in withdrawing all support from the mold-boards A and permits the latter to fall and be withdrawn, and also lowers and folds the arches in such position that continued longitudinal movement of the runner will eifect their withdrawal entirely from the molded culvert.

Inasmuch as the runner, the sections D and D of which normally form supports for the several arches, extends along the ground, its sliding movement for the purpose of breaking up and withdrawing the core, is a comparatively easy one, and it will be further noted that the pivotal connections of the lower arch sections C with said runner,

and also the beveled bearingsurfaces of the lower arch sections upon their supporting blocks F, are such as to permit of ready angular movement of said lower arch sections for purposes of removal, as before described. 7

Attention 'is further called to the fact that in practical use, inclined supports G are employed and extend from the surface of the ground to the lower portions of the upper arch sections C, these supports G being adapted to receive the lower of the series of the mold-boards A, thus leaving the lower arch sections C absolutely free of contact with the mold-boards, and thus free for angular swinging movement when the run ner is moved longitudinally.

I [claim 1. A collapsible culvert core, embodying a runner, and a plurality of arches supported on therunner and adapted to receive mold-boards, eachof said arches comprising upper and lower sections which are hingedly connected to one another, and a supplemental section carried by the said upper section and laterally adjustable with respect thereto, and cooperating means for vertically adjustably connecting the lower arch section to the said runner.

2. A collapsible culvert core, embodying a runner having vertical series of openings at spaced points, and a plurality of arches supported on the runner and adapted to receive molding boards, each of said arches comprising an upper section and a lower section hinged to the upper section and provided with a slot adapted to receive the runner, cleats arranged alongside/the said slot and provided with transverse openings, and a member for engagement through said cleat openings and through a selected opening of one of the runner series of openings whereby to secure the arch in selected vertical adjustment with respect to the runner.

3, A collapsible culvert core, embodying a runner, and a plurality of arches supported on the runner and adapted to receive mold-boards, each of said arches comprising upper and lower sections hingedly connected along their contiguous edges, and a supplemental section which is carried by the said upper section and laterally adjustable with respect thereto.

4;. A collapsible culvert core, embodying a runner, and a plurality of arches supported on the runner and adapted to receive mold-boards, each of said arches comprising upper and lower sections hingedly connected along their contiguous edges, and a supplemental section of substantially similar size and shape to said upper section, said supplemental section being provided with an elongated horizontal slot, and a clamping bolt extending from the said upper section and through said slot of the supplemental section whereby to secure the latter in selected lateral adjustment with respect to the former.

5. A collapsible culvert core, embodying a plurality of collapsible arches adapted to receive and support mold boards, a runner extending beneath the entire series of arches and supporting the same, and adjustable detachable connections between said arches and said runner, said runner being formed in longitudinally alined sections having detachable connections at their meeting ends.

6. A collapsible culvert core, embodying a runner and a plurality of arches supported on the runner and adapted to receive mold boards, each of said arches comprising upper and lower sections hingedly connected along their contiguous edges, and a supplevided With cleats on one face forming supports for the inner portion of the supplemental section when the latter is adjusted laterally, and a vertical-beam for supporting the lateral portion of the supplemental section in laterally adjusted position, all substantially as and for the purpose set forth. ARTHUR E. CAMBLIN. Witnesses:

J. R. CAIN, Jr., *R. E. ToMLINsoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 03f v 

